Redalyc.First Records of Lycaena Helle ([Denis & Schiffermüller], 1775) for the Balkan Peninsula (Lepidoptera: Lycaenidae)

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Redalyc.First Records of Lycaena Helle ([Denis & Schiffermüller], 1775) for the Balkan Peninsula (Lepidoptera: Lycaenidae) SHILAP Revista de Lepidopterología ISSN: 0300-5267 [email protected] Sociedad Hispano-Luso-Americana de Lepidopterología España Popovi, M.; Duri, M.; Franeta, F.; van Deijk, J. R.; Vermeer, R. First records of Lycaena helle ([Denis & Schiffermüller], 1775) for the Balkan Peninsula (Lepidoptera: Lycaenidae) SHILAP Revista de Lepidopterología, vol. 42, núm. 166, abril-junio, 2014, pp. 287-294 Sociedad Hispano-Luso-Americana de Lepidopterología Madrid, España Available in: http://www.redalyc.org/articulo.oa?id=45532157009 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative 287-294 First records of Lycaen 7/6/14 13:52 Página 287 SHILAP Revta. lepid., 42 (166), junio 2014: 287-294 eISSN: 2340-4078 ISSN: 0300-5267 First records of Lycaena helle ([Denis & Schiffermüller], 1775) for the Balkan Peninsula (Lepidoptera: Lycaenidae) M. Popovic´, M. –Duric´, F. Franeta, J. R. van Deijk & R. Vermeer Abstract This paper presents the first finding of Lycaena helle ([Denis & Schiffermüller], 1775) in the Balkan Peninsula on Balkan (Stara Planina) Mts. The butterfly was discovered in the bordering region between Serbia and Bulgaria. European distribution of this boreo-montane species is confined to northern parts of the continent with isolated colonies in central and south-western Europe. It is shown to be endangered at both European and regional level, and thus marked as one of the priority species for protection. In the Balkans the species can be found in mountain bogs associated with small streams where plant communities Geo coccinei-Deschampsietum caespitosae are developed . Due to land abandonment these habitats are prone to succession toward a forest ecosystem and should be monitored and managed in order to sustain the current state. It could be achieved more easily in Bulgaria, where habitats are a part of the Natura 2000 network, but it is harder for Serbia where ski tourism has been actively developed in the last decade, and where the European Union legislation does not apply. KEY WORDS: Lepidoptera, Lycaenidae, Lycaena helle , Stara Planina, habitat, conservation, Serbia, Bulgaria. Primer registro de Lycaena helle ([Denis & Schiffermüller], 1775) para la Península Balcánica (Lepidoptera: Lycaenidae) Resumen Este trabajo presenta el primer registro de Lycaena helle ([Denis & Schiffermüller], 1775) en la península Balcánica sobre los montes balcánicos (Stara Planina). La especie fue descubierta en la frontera entre Serbia y Bulgaria. La distribución europea de esta especie boreo-montane está confinada a las partes del norte del continente con colonias aisladas en el centro y suroeste de Europa. Está demostrado que es una especie en peligro de extinción tanto a nivel europeo como regional y siendo, por tanto, una especie que necesita prioritaria protección. En los Balcanes la especie puede encontrarse en zonas montañosas relacionadas con pequeños torrentes donde se desarrolla una asociación de plantas Geo coccinei-Deschampsietum caespitosae . Debido al abandono de la región estos hábitats son propensos a evolucionar hacia un ecosistema de bosque y tendría que realizarse un seguimiento, para mantenerlos en su estado actual. Podría conseguirse en Bulgaria, donde los hábitats forman parte de la red Natura 2000, pero es más difícil en Serbia donde el turismo de esquí se ha desarrollado activamente en la última década y donde la legislación europea no se aplica. PALABRAS CLAVE: Lepidoptera, Lycaenidae, Lycaena helle , Stara Planina, hábitat, conservación,Serbia, Bulgaria. Introduction The Violet Copper - Lycaena helle ([Denis & Schiffermüller], 1775) is a relict boreo-montane species with a Palaearctic distribution. It is found from the French Pyrenees in the west throughout central and northern Europe, including most of Fennoscandia. In Asia, the butterfly inhabits Russia 287 287-294 First records of Lycaen 4/6/14 19:44 Página 288 M. POPOVI C,´ M. –D URI C,´ F. FRANETA, J. R. VAN DEIJK & R. VERMEER (from Siberia to the Ussuri region) and reaches the Far East through Mongolia and China (TUZOV et al ., 2000; NEKRUTENKO & TSHIKOLOVETS , 2005; BOZANO & WEIDENHOFFER, 2007). In the European part of its range, the butterfly is found in widely scattered populations, thriving where suitable habitats remained intact. It suffered a strong decline in the last decades and became extinct in several countries (VAN SWAAY & WARREN, 1999; KUDRNA, 2011). Its presence in Spain is questionable, since there are no new records after 1985 (GARCIA- BARROS et al ., 2004). In many countries a strong decline has been recorded, even in those where populations used to be numerous, like Sweden, Finland and Belgium, where a decrease of 50% has been reported. In Switzerland and Norway the decline is a little less significant, while the strongest population decrease was recorded in Germany and Austria (75-100%), where many populations have become extinct (VAN SWAAY & WARREN, 1999). Also, the nearest populations of the species in Romania are marked as declining. There are several known historical records near Bucharest, Sighisoara and for the Romanian Banat (SZEKELY, 2008). Six known populations are still surviving in Romania, where one near Vad and the one near Baia Mare are being treated as stable. However, even those populations are at risk in the very near future due to afforestation and natural successions or eventual clear forest cuttings (CRAIOVEANU et al ., 2013; SZEKELY & CRAIOVEANU, pers. comm.). Also, the butterfly is now treated as extinct on a national level in Slovakia, the Czech Republic, Hungary, Italy and Latvia (VAN SWAAY et al ., 2010). L. helle inhabits peat and sphagnum bogs, damp flowery meadows, woodland margins and clearings, river banks, and hillsides (TSHIKOLOVETS, 2011). The habitat is usually characterised by large densities of the larval host plant Polygonum bistorta L. composing Deschampsia cespitosa- Polygonum bistorta communities on humid, moderately acidic and nutrient poor grasslands (FISCHER et al., 1999). In the Russian part of its range a wider variety of foodplants like Polygonum amphibium L., Rumex aquaticus L., Rumex acetosa L. and Bistorta elliptica (Willd. ex Spreng.) are reported (TUZOV et al ., 2000), while in Fennoscandia it is reported to use Polygonum viviparum L. (TOLMAN & LEWINGTON, 2008). In most of Europe the species is univoltine and can be found on the wing from April to July, most commonly from May to June. It is bivoltine in some German populations (MEYER, 1981) and in Romania (SZEKELY, 2008). L. helle is listed as endangered (EN) in Europe (VAN SWAAY et al ., 2010), and is treated as a Species of Community Interest, included in both Annex II and IV of the Habitats Directive of the European Commission (92/43/EEC) . The paper aims at describing the new findings of this rare and threatened butterfly in the bordering region between Serbia and Bulgaria. Some of the threats affecting its habitats on Stara planina are highlighted and a few conservation actions are proposed for each country. The surveyed region The study area comprises the westernmost part of Balkan Mts. (also called Stara Planina Mts.) at the bordering region between Serbia and Bulgaria (see Fig. 1). This large mountain massif spreads from eastern Serbia almost to the Black sea. The very diverse geology, large altitudinal range between foothills and mountain peaks, complex types of soil cover and temperate-continental climate on Stara Planina resulted in high plant and animal diversity (AND– ELKOVIC ´, 1958; LAKUSˇIC ´ & C ´ETKOVIC ´, 2007). New findings of Lycaena helle for the Balkans SERBIA , P IROT , D OJKINCI , P ONOR (43º 14’ 47” N, 22º 48’ 35” E; 1427 m) The locality Ponor near Dojkinci village refers to montane grassland used as pasture for many years. The geological substrate consists of sandstone rich in mica and quartz and marlstone from the Triassic period (AND– ELOKOVIC ´ et al ., 1976; CVIJIC ´, 1996). As the entire area was a lake in distant history (Vladica Stojadinovic´, pers. comm.), there are some marshy fragments still remaining in the 288 SHILAP Revta. lepid., 42 (166), junio 2014 287-294 First records of Lycaen 4/6/14 19:44 Página 289 FIRST RECORDS OF LYCAENA HELLE ([DENIS & SCHIFFERMÜLLER], 1775) FOR THE BALKAN PENINSULA valley, with the most interesting butterfly habitats on the boggy meadows near the creek, close to the Ponor cave (Fig. 2). It consists of the Geo coccinei-Deschampsietum caespitosae plant community with a lot of Polygonum bistorta hostplants near the stream and in numerous small sinkholes. The first three authors visited Ponor on 17-VI-2011 searching for new populations of Boloria eunomia (Esper 1799). Although B. eunomia was not found in the surveyed area, soon after arrival the first specimens of L. helle were spotted. During the whole survey, approximately 30 specimens were seen, almost all of them quite worn, indicating that mid June is the end of their flight season here. The butterflies were often observed resting on Geum coccineum Sm. and Ranunculus sp . flowers, Carex sp . leaves and on vegetation surrounding the creek. Two females and two males were collected for detailed study, and more butterflies were photographed. The locality was revisited on 9-VII-2011, but as expected, no butterflies were spotted. During the next year, the area was revisited by the authors but only few
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